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Table 1 Subjects’ characteristics

From: Short-term effects of a nicotine-free e-cigarette compared to a traditional cigarette in smokers and non-smokers

  Overall Smokers Non-smokers P value
Gender (M/F) 11/9 4/6 7/3 0.370a
Age (mean ± SD, years) 39.3 ± 12.6 42.3 ± 12.8 36.2 ± 12.3 0.291b
Weight (mean ± SD, kg) 67.9 ± 10.4 63.5 ± 10.1 72.3 ± 9.2 0.056b
Height (mean ± SD, cm) 169. ± 10.0 163 ± 7.4 176 ± 8.3 0.002b
BMI (mean ± SD, kg/m2) 23.5 ± 2.5 23.7 ± 3.1 23.3 ± 1.9 0.704b
Smoke history (pack-years) - mean ± SD (range) - 19.4 ± 10.8 (5–35) - -
  1. aFisher’s exact test
  2. bt-test for equality of means